Corkscrew



FIG. 1 is a perspective view of the corkscrew showing our new design;

FIG. 2 is a left side view thereof, the right side view being identical to the left side view:

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a front view thereof. 

CLAIM The ornamental design for a corkscrew, as shown and described. 